“Ebook readers might cause problems. This has become a controversial topic as more and more people use and love ereaders. A close friend of mine doesn’t go anywhere without her Kindle and will probably be buried with it. A Wolf, she was dismayed when I shared the findings of a new Harvard Medical School study:23 reading an ebook in the hour before bed delayed sleep more than reading a print book under normal lamplight, and it also increased sleep inertia the next day.”
